Safety elevator device.



l. SPIRADEK, S. KALISZ 64 W. WILKOSZ.

SAFETY ELEVATOR DEVICE.

APPLICATION FILED JUNE 8, WM.

Patented Dev. 28, 1915.

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. ILLINOIS.

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Specification of Letters Patent.

Patented Dec.;?8,il915.

Application filed June 8, 1914. Serial No. 343,850.

To all whom it may concern I Be it known that we, IGNACY SPIRADEK,STEFAN KALIsz, and WLADYSLAW WILKosz, subjects of the Emperor ofAustria-Hungary, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in SafetyElevatorDevices, of which the following is a specification.

This invention relates to certain new and useful improvements inelevator safety devices.

For the purpose of preventing accidents in connection with elevators, itis now designed to provide means whereby the electric power circuit forrunning the elevator cars is completely broken whenever any one of thedoors of the elevator shaft is in its open position, or in other words,the opening and closing of each individual shaft door resultsautomatically in simultaneously opening and closing the electric circuitof the system.

A further object is to provide a second electric circuit for the systemwhich is normally open but may be held closed by the operator upon thecar whenever it is desired to move the car while a shaft door isopenedand the main circuit broken.

A still further object is to provide a box inclosed normally opencontact switch at each floor landing of the elevator shaft and adaptedto be closed and retained in that position for completing the electriccircuit of the system upon the closing and engagement thereby of theshaft door of that particular landing.

With these general objects in view an others that will appear as thenature of the invention is better understood, the same consists inthenovel combination and arrangement of parts to be hereinafter morefully described, illustrated in the accompanying drawings, and pointedout in the appended claims. I

In the drawing forming a part of this application and wherein likedesignating numorals refer to corresponding parts throughout the severalviews :Figure 1 is a Sldfl elevation of the door-actuated switchportions thereof and the casing therefor being shown in section. Fig. 2is a top plan view of the switch with the casin removed and partsthereof broken away. ig. 3 is a perspective view of the insulated switcharm connection detached. 1

in its path of movement to engage andoperate an electric switch 18. Theelectric switch 18 positioned within a casing 19 is mounted interiorlyof the elevator shaft at each floor landing and is so positioned at theside of each door-way as to allow the door 16 when closed to engage anddepress the operating switch arm 20 of the switch positioned at thatparticular landing. The switches 18 each consist of a blade 21pivoted-at one end to a post 22 which post is electrically-connectedwith the line wire 23 leading to the main electric cable. The blade isprovided adjacent its free end with a circular boss 24 having acylindrical contact block 25 secured therein and having a and by meansof which bracket the switch is positioned at the. desired point upon theshaft wall. The block 28 is electrically-connected with an end of theline wire 23, the switch being positioned within a break in said linewire and between the broken ends thereofand theswitch is thereby adaptedto break and complete the circuit of the line wlre.

The switch casing 19-is mounted upon the di-electric block 30 and isprovided with 0pposite perforations 32 for the passage of the ends ofthe line wire 23. V The free end of the blade 21 outwardly of the boss24 is provided with a bracket 33 of the form illus: trated in Fig. 3 andformed of di-electric material, the same being rigidly secured to saidblade. The switch arm 20 has a square portion 34 slidably-mounted withinthe rectangular opening 35 of said bracket while an encircling spring 36of said arm bears between the upper face of the blade 21 and the armshoulder 37, thus normally holding the arm projecting as illustrated indotted lines in Fig. 1. A leaf spring 38 carried by the boss 22 engagesbeneaththc blade 21 and normally positions the same inclined as alsoillustrated by dotted lines in Fig. 1, and in which position the contactblocks 25 arm 20. It will be seen that an inward.

longitudinal impulse imparted to the rod by the door slightly compressesthe spring 36 during the sliding of the arm within the blade openin 35while the engagement of the spring with the blade moves the bladeagainst the leaf spring 38- and moves the contacts 25 and 26 into flatseating engagement with each other.

The complete operation of the device will be apparent from thisdescription in that the closing of the door closes the electrical switchof the system at each floor landing,-

so that the car may freely operate and this closing of the circuit isautomatically broken when anyone of the doors 16 is opened, as at suchtimes the switch automatically returns to the dotted line positionillustrated in Fig. 1, and the circuit being broken when any door of theshaft is open, it will be evident that the elevator will be unable torun at such times and must necessarily therefore, be positioned at suchopen door whenever the circuit is so broken and thus preventing personsfrom falling down the open shaft, it being impossible for the car tooperate when any shaft door is opened, and also impossible to open anyof the said doors from the outside of the shaft.

The present device is a protection to the public in preventing accidentsincident to the elevator service.

What we claim as new is 1. A device of the class described, compost andblade adapted for normally separating said contacts, a di-electricbracket seswitch arm slidable within said opening, a projection springencircling said arm and engaging the same and said blade, and a rollerin the outer free end of said arm.

cured to the free end of said blade and hav ing a rectangular openingtherethrough, a

2. A device of the class described comprising a support, a di-electricbase secured to the said support, acasing upon said base provided withan opening therein opposite the base, a post supported by the base, a

switch plate pivoted through the said post, a stop lug upon the saidpost beneath the rear extension of the plate, an elevating normallypositioning spring carried by the said post and in engagement with thelower surface of the said plate, a cylindrical contact supported by thebase and spaced from the said post, a second cylindrical contact securedto the'lower face of the arm, a di-' electric block secured to the freeend of the plate and having an opening therethrough, and an armresiliently mounted and slidably positioned within the said bracketopening and extending outwardly through the said casing opening.

In testimony whereof we affix our signatures in presence of twowitnesses.

IGNAGY SPIRADEK. STEFAN KALISZ. WLADYSLAW l VILKOSZ.

Witnesses:

Pro'ro SPIRADEK, Mrcnon'r Wrsmownm.

